Air heater



)T.' H. MONAGHAN.

AIR HEATER.

APPLICATION FILED MAYIZ, 1921.

1,425,674. Patented Aug. 15, 1922 2 SHEETS-SHEET l..

Patented Aug. 15, 1922.

2 SHEETSSHEET 2.

-lTED THOMAS H. MONAGHAN, OF CHICAGO, ILLINOIS.

AIR HEATER.

specification of Letters Patent. Patented Aug, 15,1922.

Application filed May 12, 1921. Serial No. 468,925.

which the following is declared to be a full,

clear and exact description.

This invention relates to air heaters, and its primary object is to increase the efficiency of air heating apparatus to supply greater volumes. of heated air in buildings, with the use of less radiating surface than heretofore;-and to circulate the heated air rapidly and to supply a substantially eventemperature at all parts of the room heated thereby.

Another object is to provide a unitary structure embodying'a large amount of heat radiating surface, arranged to give a maximum of heat efficiency, combinedwith means for rapidly forcing air past. said radiating surface and for deflecting it in any of several directions from the heater. Another object is toprovide an air heater of simple, practical and economical construction, having comparativelyfew parts, easily assemled. v

The invention consists in the several novel features hereinafter fully set forth and claimed. I A

The invention is clearly illustrated in the accompanying drawings, in which Fig. 1 is a front elevation of an air heater embodying a' simple form of the present invention; Fig; 2 is a view thereof, partly in side elevation and partly in vertical-crosssection, the line of section being indicated at 2-2 in Fig. 1; 3 is a horizontal 580" tion taken on line 3 3 of-Fig. 2; and'Fig. 4 is a vertical cros'"s-s ection' taken on line 4 4. of Fig. 2.

Referring to sald drawings, which ,illustrate one embodiment of the invention, the reference character 5 designates a casing,

preferably rectangular in cross-section and formed-0f four side walls 6 connected togather at the corners by suitable reinforcing,

means. In the lower end of the casing 5 is a fan or blower 7 which is mounted ona shaft 8 j ournaled in bearing boxes 10 mount ed on two opposite side walls 6. The shaft may be driven from any suitable source of power, and I have shown a'pulley 11 mounted on it which pulley may be belted to a drive pulley. Co d air inlet ports 12 in the r'opposite sides walls of the casing admit air to the fan or blower and a scroll 9 around the fan, together with the side walls of the casing'fi form the fan casing for the fan or blower. The discharge outlet from said fan casing is directed upward within the casing 5, and above said outlet are, a series of steam coils or radiators 13 which leave a tortuous passage for theair. Said steam coils are shown in the form of radiators, and said radiators are supported in said casing in an inclined direction, one overlapping the other, the several radiators inclining in the same direction and being arranged approximately parallel with each other. Conveniently, shelves 14, 15, are secured to the casing and form rests or supports for the radiators. Baffle plates 16 below the lower ends of the radiators and extending parallel therewith, and battle plates 17 adj acent their upper ends and extending at right angles to the radiators, direct the air currents around the columns of the radiator coils.

Leading to each radiator is a steam supply pipe 18 which has a valve 19 interposed therein and said steam supply pipes 18 run to a header 20 which leads to the source of steam supply. An outlet pipe 21 leads from each radlator and runs to a return pipe 22, which carries the water of condensation back to the steam source. Check valves 23 are placed in the outlet pipes 21 to prevent water from returning to the radiators.

The casing is provided at its upper end with a top-member 24 of inverted pyramidal like form, the four sides ofwhich converge downwards from the outer sides of the structure. Frame extensions 24.: support said top member 24". Discharge openings 25Ifo'r the escape of the heated air, are left between member 24 and top of the casing, and covers 26 are provided for closing any of said discharge openings. Conveniently, said covers may comprise metal sheets or plates 26 arranged parallel with the side walls 6 and held in place on .the walls by bolts and nuts 27, the covers having) vertical slots to receive the shanks of the olts for permitting vertical adjustment of'the covers. Obviously, the heated air can be directed laterally of the heater, in any of the several directions, or in all directions, by properly adjusting the covers and in this manner the heated air can be. sent in any or very direction laterally, from the heater.

In use, steam'is supplied to any or all of the radiatorstdepending upon the outsidetemperature, and the temperature it-is desired to maintain in the room where the heater is located, and the fan or blower is set in motion, A large .volume of air is thereupon passed through the casing, and

. because of the abnormally large heat radiating surface in the casing, around which it is forced by the fan, it isquickly heated to the desired temperature and discharged through the discharge openings at the top maintained'in all parts] of the room where of the casin in a generally horizontal direction, the held being controlled by the adjustable covers.

It has been found in actualpractice that,-

a uniform, comfortable temperature can be the heater is installed, and that less radiating surface is required than where indi-' vidual radiators are used; that a great saving of time and labor results from' the installation and use of the heater, and it is economical in use.

More or less variation of the exact details of construction is possible without departing from the spirit of this invention; I

desire to secure by and a hot air discharge opening, a fan mounted in said casing adjacent said cold air inlet opening, and a series of inclined overlapping steam coils mounted in said 40,.

casing above said fan, in the path of air currents from the fan to the discharge openmg 2: An air heater'comprising a rectangular elongated fan casiiig having a cold air inlet.

sides, a fan mounted in said casing adjacent 1 said cold airinlet opening, and a-series of independent radiators mounted in said casing between the inlet and discharge opening, said radiators lying in inclined directions, parallel with and ooverlapping each other.

3. An air heater comprising a rectangular casing having a cold air inlet opening t its bottom, and discharge openings at its, p, disposed around its four sides, a fan mounted in said casing adjacent said cold air inlet opening, a series of independent radiators mounted in said casing between the inlet and discharge openings, said radiators lying in inclined directions, parallel with and overlapping each other, and baflle plates at the tops and bottoms of each radiator.

4. An air heater comprising a rectangular casing having a cold air inlet opening at its bottom, and discharge openings at its top,

disposed around its four sides, a fan mounted in said casing adj agent said cold air inlet opening, a series of independent radiators mounted in vsaid casing between the inlet and discharge openings, and an inverted,

pyramidal top over said discharge openings.-

' 5. An air heater comprising a rectangular casing having a cold air inlet opening at its bottom, and discharge openings at its top,

disposed around its four sides, a fan mounted in said casing adjacent said cold air inlet opening, a series of independent radiators mounted in said casing between the inlet and discharge openings, an inverted, pyramidal topover said discharge openings, and individual covers for said discharge openings djustably mounted on said casing.

THOMAS H. MONAGHAN. 

